Download NV C7 Elevation Conveyance Exam Questions and Answers and more Exams Technology in PDF only on Docsity!
Question 1. Which federal agency is primarily responsible for enforcing workplace safety regulations in the United States? A) EPA B) OSHA C) FCC D) DOT Answer: B Explanation: OSHA (Occupational Safety and Health Administration) is responsible for enforcing workplace safety regulations, ensuring safe and healthful working conditions. Question 2. What personal protective equipment (PPE) is most critical when working near moving elevator machinery? A) Hard hat B) Safety glasses C) Hearing protection D) All of the above Answer: D Explanation: All listed PPE may be required; hard hats protect from falling objects, safety glasses from debris, and hearing protection from loud machinery. Question 3. According to Nevada state regulations, which of the following must be posted at an elevator job site? A) Elevator inspection certificate B) Building blueprints C) Fire escape plan D) Company insurance policy Answer: A Explanation: The elevator inspection certificate must be posted to indicate compliance and safety inspection status. Question 4. What is the primary purpose of Lockout/Tagout (LOTO) procedures?
A) To store tools safely B) To prevent unauthorized use of equipment C) To de-energize and secure equipment during maintenance D) To clean up hazardous spills Answer: C Explanation: LOTO procedures ensure that equipment is de-energized and cannot be started accidentally during maintenance. Question 5. Which is an example of fall protection equipment required by OSHA when working at heights? A) Gloves B) Safety harness C) Earplugs D) Dust mask Answer: B Explanation: Safety harnesses are a primary means of fall protection when working at elevations as required by OSHA. Question 6. In an elevator emergency, what is the function of the emergency stop button? A) To open the doors B) To activate the alarm C) To immediately halt the elevator's movement D) To call maintenance Answer: C Explanation: The emergency stop button is designed to bring the elevator to an immediate stop in case of danger. Question 7. What is the first action to take if someone is trapped in an elevator? A) Attempt to open the doors manually B) Call emergency services
Explanation: The controller is the central control unit that manages the elevator’s movement and operation. Question 11. In a traction elevator, what is the function of the counterweight? A) Provides emergency braking B) Balances the elevator car C) Lubricates the guide rails D) Controls door opening Answer: B Explanation: The counterweight balances the elevator car, reducing the load on the motor and increasing efficiency. Question 12. For ADA compliance, what is the minimum clear width for an elevator cab door? A) 24 inches B) 32 inches C) 36 inches D) 40 inches Answer: B Explanation: ADA standards require a minimum clear door width of 32 inches for accessibility. Question 13. What component is used to transfer force from the elevator motor to the hoist ropes in a traction elevator? A) Sheave B) Piston C) Guide shoe D) Buffer Answer: A Explanation: The sheave is a grooved wheel that transfers force from the motor to the hoist ropes. Question 14. Which part of a hydraulic elevator system holds and moves the hydraulic fluid?
A) Buffer B) Cylinder C) Pump unit D) Governor Answer: C Explanation: The pump unit stores and moves hydraulic fluid to operate the elevator. Question 15. The main safety device preventing an elevator from falling in case of rope failure is the: A) Door lock B) Buffer C) Safety gear D) Speed governor Answer: C Explanation: Safety gear engages in the guide rails to stop the elevator if the ropes fail. Question 16. What feature must elevator call buttons have to comply with ADA requirements? A) Be red in color B) Be at least 1 inch in diameter C) Be mounted at a specified height and have braille D) Flash when pressed Answer: C Explanation: ADA requires call buttons to be accessible in height and marked with braille for visually impaired users. Question 17. Which component in a traction elevator ensures that the elevator does not exceed a safe speed? A) Buffer B) Door operator C) Governor
Question 21. In a gearless traction elevator, how is the elevator car moved? A) Direct coupling of motor to sheave B) Hydraulic pressure C) Chain and sprocket D) Manual winding Answer: A Explanation: Gearless traction elevators have the motor directly coupled to the sheave for high-speed operation. Question 22. Which of the following is a standard elevator safety feature to prevent car movement when doors are open? A) Door restrictor B) Interlock C) Safety edge D) Call cancel button Answer: B Explanation: The interlock prevents the elevator from moving unless the doors are properly closed and locked. Question 23. What is the typical function of the elevator car guide rails? A) Support the counterweight B) Guide the movement of the car in the hoistway C) Lubricate the ropes D) Control door speed Answer: B Explanation: Guide rails keep the elevator car aligned and stable within the hoistway. Question 24. What is the main advantage of a machine-room-less (MRL) elevator? A) Faster speed
B) No need for a separate machine room C) Uses hydraulic oil D) Requires more space Answer: B Explanation: MRL elevators save building space by integrating equipment within the shaft. Question 25. Which device in an escalator detects when a foreign object becomes trapped at the comb plate? A) Step chain B) Balustrade C) Comb plate switch D) Skirt brush Answer: C Explanation: The comb plate switch detects obstructions and stops the escalator to prevent injury. Question 26. What is the function of an escalator’s handrail guard? A) Lubricates the handrail B) Prevents fingers and objects from being caught C) Tracks handrail speed D) Illuminates the steps Answer: B Explanation: Handrail guards protect users from entrapment and injury. Question 27. In a moving walk, what is the main operational difference between a pallet type and a belt type? A) Belt types are only used outdoors B) Pallet types have rigid surfaces; belt types use flexible belts C) Belt types are slower D) Pallet types cannot be inclined
A) Guides the handrail B) Provides structural support C) Houses the step chain D) Illuminates the escalator Answer: B Explanation: The truss is the main structural frame supporting all escalator components. Question 32. Why is regular step demarcation maintenance important on escalators? A) Reduces electrical consumption B) Prevents step slippage and user accidents C) Increases escalator speed D) Improves escalator appearance Answer: B Explanation: Proper step demarcation helps users recognize step edges, reducing slip and trip hazards. Question 33. What is the function of the moving walk’s drive unit? A) Powers the handrail only B) Moves the pallets or belt C) Illuminates the walkway D) Activates emergency stop Answer: B Explanation: The drive unit powers the movement of the pallets or belt in a moving walk. Question 34. Which maintenance task is essential for moving walks to prevent belt tracking issues? A) Cleaning the balustrade B) Adjusting belt tension C) Lubricating the steps D) Polishing the handrail Answer: B
Explanation: Proper belt tension is required to maintain alignment and smooth operation. Question 35. Which electrical principle states that current is directly proportional to voltage and inversely proportional to resistance? A) Kirchhoff’s Law B) Faraday’s Law C) Ohm’s Law D) Newton’s Law Answer: C Explanation: Ohm’s Law defines this fundamental relationship in electrical circuits. Question 36. What is the unit of electrical resistance? A) Ampere B) Ohm C) Volt D) Watt Answer: B Explanation: The ohm is the unit of resistance in the International System of Units. Question 37. When reading an elevator wiring diagram, what does a ladder logic diagram mainly represent? A) Physical layout of components B) Sequence of electrical operations C) Hydraulic flow D) Maintenance schedule Answer: B Explanation: Ladder logic diagrams represent the sequence of electrical operations in control circuits. Question 38. In an elevator electrical circuit, what is the role of a relay?
Explanation: Conduit protects elevator wiring from physical damage and meets code requirements. Question 42. What is the main function of an elevator selector switch? A) Controls door operation B) Determines the car’s position in the hoistway C) Activates emergency lighting D) Monitors oil level Answer: B Explanation: The selector switch tracks the car’s position for accurate stopping and dispatching. Question 43. In DC elevator motors, what does reversing the polarity of the supply voltage do? A) Increases speed B) Stops the motor C) Reverses the motor direction D) Reduces current Answer: C Explanation: Reversing polarity changes the direction of rotation in DC motors. Question 44. Which safety device must be reset manually after being activated in an elevator control system? A) Overload relay B) Light switch C) Floor selector D) Door open button Answer: A Explanation: Overload relays protect against excessive current and must be reset after tripping. Question 45. What is the main function of a programmable logic controller (PLC) in elevator systems? A) Provide lighting
B) Control elevator operations based on programmed logic C) Lubricate the guide rails D) Increase motor speed Answer: B Explanation: PLCs automate elevator operations according to custom programming. Question 46. What does a typical elevator limit switch do? A) Regulates oil pressure B) Signals when the car has reached a specific position C) Controls door lighting D) Monitors handrail speed Answer: B Explanation: Limit switches send signals when the car reaches designated positions, improving safety and control. Question 47. Which elevator component provides backup lighting during power failure? A) Main control panel B) Emergency battery pack C) Door operator D) Selector switch Answer: B Explanation: The emergency battery pack ensures lighting is available for passenger safety during outages. Question 48. What effect does a short circuit have on an electrical system? A) Increases resistance B) Stops current flow C) Causes excessive current, potentially damaging equipment D) Reduces voltage to zero
A) When working below ground B) When working at heights above 6 feet C) When using electrical testers D) When lubricating guide rails Answer: B Explanation: OSHA requires fall protection, such as a full-body harness, when working at heights above 6 feet. Question 53. What component is responsible for opening and closing elevator doors automatically? A) Door restrictor B) Door operator C) Safety edge D) Governor Answer: B Explanation: The door operator is an electromechanical device that opens and closes elevator doors. Question 54. Which of the following is a primary hazard when working with elevator control panels? A) Sunburn B) Electrical shock C) Slippery floor D) Tripping Answer: B Explanation: Electrical shock is a major hazard due to the presence of live circuits in control panels. Question 55. What is the key difference between geared and gearless traction elevators? A) Gearless use a hydraulic piston B) Gearless have the motor directly coupled to the sheave C) Geared use steel belts D) Geared elevators have no counterweight
Answer: B Explanation: Gearless elevators connect the motor directly to the sheave for smoother, faster operation. Question 56. What is the primary function of the elevator car sling? A) Supports the car platform and frame B) Guides the counterweight C) Lubricates the ropes D) Holds the emergency phone Answer: A Explanation: The car sling holds the car platform and frame, connecting to the hoist ropes or hydraulic piston. Question 57. What is a key maintenance task for elevator traction ropes? A) Painting B) Cleaning and lubricating C) Tightening bolts D) Replacing fuses Answer: B Explanation: Cleaning and lubricating traction ropes prevents wear and extends their service life. Question 58. Which accessibility feature is required inside an elevator cab for ADA compliance? A) Emergency phone B) Fire extinguisher C) Large mirror D) Carpeted floor Answer: A Explanation: ADA requires an emergency communication system, such as a phone, inside elevator cabs. Question 59. What is the function of the elevator pit?
D) Power failure Answer: B Explanation: The emergency stop button is designed for users to stop the escalator instantly if needed. Question 63. What is a common problem caused by inadequate escalator lubrication? A) Excessive noise and wear B) Sudden speed increases C) Incorrect step alignment D) Handrail slippage Answer: A Explanation: Lack of lubrication leads to increased friction, noise, and component wear. Question 64. Which of the following is a standard moving walk safety feature? A) Step chain B) Emergency stop button C) Handrail guard D) Balustrade Answer: B Explanation: Moving walks are equipped with emergency stop buttons for user and maintenance safety. Question 65. What does the escalator step demarcation line indicate? A) The beginning of the escalator B) The step’s edge for user safety C) The direction of movement D) The location of the motor Answer: B Explanation: The demarcation line indicates the step edge, helping users avoid missteps. Question 66. What is the function of a handrail drive motor in escalators?
A) Moves the steps B) Drives the handrail at the same speed as steps C) Opens the comb plate D) Controls lighting Answer: B Explanation: The handrail drive motor ensures the handrail moves at the same speed as the steps. Question 67. What is the main cause of belt misalignment in moving walks? A) Overuse B) Incorrect tensioning C) Excessive lubrication D) Low voltage Answer: B Explanation: Incorrect belt tensioning can cause the belt to drift, leading to misalignment. Question 68. What is the unit of electrical current? A) Ohm B) Volt C) Ampere D) Watt Answer: C Explanation: The ampere is the standard unit for measuring electric current. Question 69. What does a typical electrical schematic symbol for a switch look like? A) A circle B) A line with a break C) A zigzag D) A triangle Answer: B
